BOP

Balance of payments.


Related Terms

NULL METHOD

A method of measurement in which the measuring circuit is balanced to bring the pointer of the indicating instrument to zero, as in a Wheatstone bridge, and the settings of the balancing controls are then read. Also known as balance method; zero method.

MOBILITY

The ability of an analytical balance to react to small load changes; affected by friction and degree of looseness in the balance components.

MACROANALYTICAL BALANCE

A relatively large type of analytical balance that can weigh loads of up to 200 grams to the nearest 0.1 milligram.

KAPITZA BALANCE

A magnetic balance for measuring susceptibilities of materials in large magnetic fields that are applied for brief periods.

HEELING ADJUSTER

A dip needle with a sliding weight that can be moved along one of its arms to balance magnetic force, used to determine the correct position of a heeling magnet.

PROACTIVE MAINTENANCE

A type of condition-based maintenance emphasizing the routine detection and correction of root cause conditions that would otherwise lead to failure. Such root causes as high lubricant contaminant, alignment and balance are among the most critical.

BALANCE PISTON

Reaction turbines have axial thrust because pressure on the entering side is greater than pressure on the leaving side of each stage. To counteract this force, steam is admitted to a dummy (balance) piston chamber at the low-pressure end of the rotor. Some designers also use a balance piston on impulse turbines that have a high thrust. Instead of piston, seal strips are also used to duplicate a piston's counter force.

BALANCER

A device used with a radio direction finder to balance out antenna effect and thus produce a sharper reading

DIP NEEDLE

A magnetic needle suspended so as to be free to rotate about a horizontal axis. An instrument using such a needle to measure magnetic dip is called a DIP CIRCLE. A dip needle with a sliding weight that can be moved along one of its arms to balance the magnetic force is called a HEELING ADJUSTER.

EQUILIBRIUM

A state of balance between forces. A body is said to be in equilibrium when the vector sum or all forces acting upon it is zero

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